A storm system and associated cold front will move through the region today, bringing mountain snow and valley rain through this evening. Some isolated thunderstorms are possible. Storm total snowfall amounts of 4 to 8 inches with locally higher amounts are expected in the western Colorado mountains, with 1 to 3 in the Gunnison basin. 3 to 5 inches can be expected near Cerro Summit. Mainly rain will occur in valleys below 8000 ft, with the exception of some northern Colorado valleys where snow levels will be at valley bottoms this morning, with little accumulation expected. After a brief break tonight into Friday morning, a colder storm system will move through the area Friday evening through Saturday. Unsettled conditions look to remain over the area through early next week, with a return to unseasonably cool temperatures. Check www.weather.gov/gjt for details and latest updates.   (Please visit http://weather.gov/gjt for more information.)